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Pike Research forecasts hybrid electric locomotive sales could reach nearly 500 units from 2011 to 2020; to utilize 514 MWh of battery capacity by 2020

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In Europe, track electrification will eliminate the need for either diesel or battery storage in many areas. Hybrid locomotives are an emerging alternative to these approaches that utilized stored energy from batteries. —senior analyst Dave Hurst. However, adds Hurst, growth in hybrid locomotives faces several key challenges.

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PNNL study outlines requirements for grid storage, reviews four electrochemical energy storage systems: vanadium redox flow, Na-beta, Li-ion and lead-carbon

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published in the ACS journal Chemical Reviews , reviews in detail four stationary storage systems considered the most promising candidates for electrochemical energy storage: vanadium redox flow; sodium-beta alumina membrane; lithium-ion; and lead-carbon batteries. In their study, Yang et al. Credit: ACS, Yang et al. Click to enlarge.

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